申请人:Sudzucker Aktiengesellschaft Mannheim/Ochensfurt
公开号:US05344974A1
公开(公告)日:1994-09-06
The invention relates to a process for the preparation of N-acyl derivatives of 5-aminolevulinic acid of general formula R-CO-NH-CH.sub.2 -CO-CH.sub.2 -CH.sub.2 -COOH, in which R stands for methyl, ethyl, propyl, isopropyl, butyl, phenyl, benzyl, furyl or furfuryl, as well as the hydrochloride of the free acid by acid hydrolysis, characterized in that the 5-hydroxymethyl furfural is condensed with a nitrile in acid solution and the N-acyl-aminomethyl furfural compound obtained is converted by photooxidation into a N-acyl-5-aminomethyl-5-hydroxydihydro-2,5-furan-2-one and the latter is reduced with zinc in acetic acid under ultrasonic treatment to N-acyl-5-aminolevulinic acid and by acid hydrolysis the 5-aminolevulinic hydrochloride is obtained.
本发明涉及一种制备5-氨基戊酸的N-酰基衍生物的过程,其通式为R-CO-NH-CH.sub.2 -CO-CH.sub.2 -CH.sub.2 -COOH,其中R代表甲基、乙基、丙基、异丙基、丁基、苯基、苄基、呋喃基或糠醛基,以及通过酸水解得到自由酸的盐酸盐。其特征在于,在酸性溶液中将5-羟甲基糠醛与一种腈缩合,得到N-酰基氨甲基糠醛化合物,然后通过光氧化将其转化为N-酰基-5-氨基甲基-5-羟基二氢-2,5-呋喃酮,最后在乙酸中用锌超声处理还原为N-酰基-5-氨基戊酸,通过酸水解得到5-氨基戊酸的盐酸盐。